Hello Arne,
thanks for youre usefull informations. I will test it in the next week. Can you
also give me your Connector parameters from the server.xml file? This settings
are very important. The Tomcat default Values for acceptCount and thread are to
high. We have reduced it to the follow:
<Connector URIEncoding="UTF-8" acceptCount="40" connectionTimeout="20000"
description="non-SSL HTTP/1.1" disableUploadTimeout="true" enableLookups="true"
maxHttpHeaderSize="8192" maxSpareThreads="24" maxThreads="40"
minSpareThreads="10" port="11121" protocol="HTTP/11" redirectPort="11123" />
Thanks and a nice Weekend
Thorsten
-----Ursprüngliche Nachricht-----
Von: Arne v.Irmer [mailto:[EMAIL PROTECTED]
Gesendet: Dienstag, 7. August 2007 10:27
An: Thorsten Saile; Slide Users Mailing List
Betreff: Slide (2.1) - tuning. Make it faster and more stable.
Hi Thorsten,
we use Tomcat 5.5.23 and java version 1.5.0_10 and slide 2.1 with a
Tx-filestore using openSuSE 10.2 . Now everything works fine (~2000 User a day
/ ~10 Gb Transfer / ~20000 hits). But in the beginning we had the
same problems.
I try to give some hints to increase the stability of slide:
1. You have to patch the slide-kernel. There is a bug with concurrent
access. In the file
jakarta-slide-server-src-2.1/src/share/org/apache/slide/store/ExtendedStore.java
at line 149 an ordenary HashMap is used. You have to change line 149 to:
private Map suspendedLocks = Collections.synchronizedMap(new HashMap());
To build the project use a build.properties
# ----- Compile Control Flags -----
compile.debug=on
compile.deprecation=off
compile.optimize=on
compile.target=1.4
build.compiler=modern
After that just change the slide-kernel-2.1.jar in the distro of slide
that you are currently using. (Look at
http://jakarta.apache.org/slide/installation.html)
2. Next turn off the "sequential-mode" in the Domain.xml. This causes
slide to wait with the next transaction until the current is done. We
had some dead lock with that. To turn it of open your Domain.xml search
for <parameter name="sequential-mode"> and replace it with
<parameter name="sequential-mode">off</parameter>
3. If you use clustering always and ever use the udp protocol (its
default). Look (linux) with from time to time with lsof -p PID how many
files the slide-tomcat has open.
4. Use Jconsole to monitor memory and thread management of the tomcat.
To do so start tomcat with the option -Dcom.sun.management.jmxremote (no needed
for java 1.6). After that start jconsole (an X-Server is
required) and connect to your tomcat. In the case of a problem you are
now able to only restart slide in a running tomcat: Go to the MBean-tab
and navigate to Catalina->WebModule->//tomcat/->none->none then use tab
Operations and press the Button reload.
For more information of the jconsole look at
http://java.sun.com/j2se/1.5.0/docs/guide/management/jconsole.html
5. To make umlauts work use UTF-8 everywhere and use a tomcat 5.5 and
slide 2.1.
6. Use apache2 with mod_jk and the ajp protocol. You than are able to
use slide within a load-balance -worker. It is easy to configure. But
look 3. ! And configure the clustercacherefresher properly. If you make
a mistake your store will be lost.
Thorsten, I hope this will help. More things may be done, but I don't
remember.
Is anyone out there who has a problem with my hints or has other good
slide-tunings. Make a post. I'm curious
Yours
Arne
--
Dipl.-Phys. Arne v.Irmer
Medienzentrum Universität Dortmund
Am Hauert 12a
44227 Dortmund
Thorsten Saile schrieb:
> Hello Arne,
>
> wich Java-Version, Application-Server and Version do you use in your
> Slide-Envoirement. I have many Problems with a few concurrent Users on Tomcat
> 5.5.17.
>
> Regards,
> Thorsten
>
> -----Ursprüngliche Nachricht-----
> Von: Arne v.Irmer [mailto:[EMAIL PROTECTED]
> Gesendet: Mittwoch, 2. Mai 2007 09:00
> An: Slide Users Mailing List
> Betreff: Re: Project Status
>
>
> We are using slide at the university of Dortmund now for two years.
> Thousands of users can be managed with slide. On one hand slide isn't
> maintained any more: As you mentioned no update was released. On the
> other hand, some developer are still working on the new 2.2 release that can
> be checked out in svn.
> The documentation of the project could be better, but the community is >
> active.
> We do not found an open source webdav-server that has implemented webdav so
> completely as slide does.
> Please tell us what the result of your evaluation of slide is. Why
> do/don't you use slide? What are the alternatives?
>
> Yours
> Arne
>
> Virtual Light schrieb:
>
>> We are currently in the formative stages of a project that would
>> utilize SLIDE and have a few questions about the SLIDE project. We
>> have noticed that the SLIDE project has not updated in over two
>> years. Is the SLIDE project active? Are defects acted upon and
>> corrected?
>>
>> Regards,
>> Bill
>>
>> _________________________________________________________________
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>>
>>
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